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DRIVEABILITY - DIESEL
Symptom List:
P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO HIGH
P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO LOW
P0100-MASS AIR FLOW SENSOR SUPPLY VOLTAGE TOO HIGH OR
LOW
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0100-MASS AIR FLOW SENSOR
SIGNAL VOLTAGE TOO HIGH.
When Monitored and Set Condition:
P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO HIGH
When Monitored: With the ignition on.
Set Condition: The MAF Sensor Signal voltage is above 4.8 volts for at least 3 seconds.
P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO LOW
When Monitored: With the ignition on.
Set Condition: The Mass Air Flow Sensor Signal voltage is below 1.6 volts for at least 3
seconds.
P0100-MASS AIR FLOW SENSOR SUPPLY VOLTAGE TOO HIGH OR LOW
When Monitored: With the ignition on.
Set Condition: The Sensor Reference Voltage A voltage to the MAF is below 4.9 volts or
above 5.1 volts for at least 3 seconds.
ASD RELAY OUTPUT CIRCUIT OPEN
ECM - 5-VOLT SUPPLY CIRCUIT
MASS AIRFLOW SENSOR
SENSOR GROUND OPEN
INTERMITTENT CONDITION
SENSOR REFERENCE VOLTAGE A CIRCUIT OPEN
MAF SENSOR SIGNAL CIRCUIT OPEN
FUEL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO THE SENSOR GROUND
CIRCUIT
SENSOR REFERENCE VOLTAGE A CIRCUIT SHORTED TO THE SENSOR GROUND CIRCUIT
MAF SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
ECM SENSOR GROUND CIRCUIT OPEN
FUEL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
POSSIBLE CAUSES
20
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